Q. Consider the following ancient civilizations and their chemical practices:

1. Egyptians – Preparation of glass and dyes
2. Chinese – Discovery of gunpowder
3. Indians – Use of zinc distillation

How many of the above are correctly matched? Select the correct answer using the codes below:
Answer: 1, 2, and 3
Notes: All three are correctly matched. Ancient Egyptians excelled in glass-making and dye preparation. Gunpowder was discovered by the Chinese in the 9th century CE. Indians pioneered zinc distillation, notably at Zawar, Rajasthan, ahead of European methods. Each practice is a historical fact from their respective civilizations, showing advanced early chemical knowledge.